chore: Drop Postgres R2DBC native-image metadata #571 #1246

Job	Run time
Docs	3m 59s
Docs	3m 59s
Checks	5m 3s
Checks	5m 3s
Run test with Postgres	6m 23s
Run test with Postgres	6m 23s
Run test with H2	5m 54s
Run test with H2	5m 54s
Run test with Postgres and several data partitions	6m 33s
Run test with Postgres and several data partitions	6m 33s
Run test with Postgres and JSONB payload	4m 22s
Run test with Postgres and JSONB payload	4m 22s
Run test with SQL Server	40s
Run test with SQL Server	6m 26s
Run tests with Yugabyte	6m 54s
Run tests with Yugabyte	6m 54s
	1h 25m 22s

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